### Program 321:Binary to Octal Conversion in C

Program 321:Binary to Octal Conversion in C
Method I:
```#include<stdio.h>
main()
{
int octalNum[]={0,1,10,11,100,101,110,111};
long int binary,i,number,temp,octal=0,j=1;
printf("Enter Binary number\n");
scanf("%ld",&binary);
temp=binary;
while(temp!=0)
{
number=temp%1000;
for(i=0;i<=7;i++)
{
if(octalNum[i]==number)
{
octal=octal+(i*j);
}
}
j*=10;
temp/=1000;
}
printf("Octal number for given Binary number %ld is %ld\n",binary,octal);
}```

Method II:
```#include<stdio.h>
#include<math.h>
int ConvertFromBinarytoOther(int);
int ConvertFromDecimalToOther(int);
int main()
{
int final,num,binary,decimal;
printf("Enter Binary Number\n");
scanf("%d",&binary);
decimal=ConvertFromBinarytoOther(binary);//Converting binary to decimal
final=ConvertFromDecimalToOther(decimal);//Converting decimal to octal
//So binary to Octal
printf("Octal number of Binary number %d is %d\n",binary,final);
return(0);
}
int ConvertFromDecimalToOther(int decimal)
{
int temp,i,j=1,final=0;
temp=decimal;
while(temp!=0)
{
i=temp%8;
final=final+(i*j);
temp=temp/8;
j=j*10;
}
return(final);
}

int ConvertFromBinarytoOther(int binary)
{
int final=0,i,inc=0,temp;
temp=binary;
while(temp!=0)
{
i=temp%10;
final=final+(i*pow(2,inc));
temp=temp/10;
inc++;
}
return(final);

}
```
Explanation:

//Coming Soon...

Output:

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 Compiler Used by me C-Free 5.0(Recommended) Other Compilers Code Blocks(Recommended) Online Compilers Ideone(Remember to give input before executing online where ever necessary)